2

Sexual activity:
If it wasn't done too vigorously and your vagina was well lubricated then usually no symptoms the next day. But probably the most common thing would be mild discomfort or slight bleeding the first time. slight welling might happen too if fairly vigorous. Its probably time for you to see a GYN or family doctor to talk about birth control now that you have having foreplay
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6

Yes and No:
Microvascular surgery can be performed to restore a missing thumb. A toe can be removed from the foot and replanted on to the hand to provide a greater functioning hand. This is significant surgery, and used primarily for very select patients.
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7

many causes:
This is an abnormal sensation. It is an increased sensitivity. This is due to nerve damage and there are multiple causes of nerve damage. In your age group the most common is environmental, secondary to diabetes, and secondary to alcohol abuse and dependence.
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